Teach a variety of engaging math lessons with ingenious dry erase boards. The boards are designed with grids on both sides! On the one side, we have printed 100 large squares arranged in a square grid. On the reverse, we've printed 4 smaller grids for a great range of activities. Refer to the helpful teacher guide for 25+ curriculum ideas. Includes: 24 boards, 12¾ x 12¾" (32.5 x 32.5 cm) and guide.